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Allow detection of CLMUL

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Manuel Pégourié-Gonnard 2013-12-18 19:14:53 +01:00
parent 5b685653ef
commit 8eaf20b18d
3 changed files with 17 additions and 11 deletions
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14
library/aesni.c
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@ -37,24 +37,24 @@
#if defined(POLARSSL_HAVE_X86_64)
/*
* AES-NI support detection routine, [AES-WP] figure 23
* AES-NI support detection routine
*/
int aesni_supported( void )
int aesni_supports( unsigned int what )
{
static int supported = -1;
unsigned int c;
static int done = 0;
static unsigned int c = 0;
if( supported == -1 )
if( ! done )
{
asm( "movl $1, %%eax \n"
"cpuid \n"
: "=c" (c)
:
: "eax", "ebx", "edx" );
supported = ( ( c & 0x02000000 ) != 0 );
done = 1;
}
return( supported );
return( ( c & what ) != 0 );
}
/*